One plot idea could be that the OC fem synth discovers she has a hidden ability that the Institute didn't even know about. Maybe she can communicate with long - lost pre - War technology. This leads to a race between different factions in the Fallout world to either control her or destroy her. Another idea is that she falls in love with a human, which is against the Institute's rules. This causes a lot of internal conflict for her as she tries to balance her feelings with her programming.
The OC fem synth could be the key to unlocking a powerful weapon left over from the pre - War era. Different factions believe she has the code or the key to activate it. So, she has to navigate through the political intrigue of the Fallout world, dealing with the Brotherhood of Steel, the Railroad, and the Minutemen all vying for her cooperation. At the same time, she's trying to figure out her own identity and what she wants to do with this new - found importance. She might also have to face off against an old - fashioned synth hunter who has dedicated his life to eradicating synths like her.
A great plot could involve the OC fem synth being hunted by a rogue group of synths. They see her as a threat because she's different and has been helping humans. As she tries to escape them, she teams up with a group of wastelanders. Along the way, she discovers secrets about the origin of synths that could change the entire Fallout universe. She has to decide whether to share this information or keep it to herself to protect those she's grown to care about. Also, her presence could attract the attention of the Enclave, who want to use her for their own evil plans.
To create an engaging OC (Original Character) fem synth in Fallout fanfiction, first focus on her backstory. Maybe she was created for a specific purpose in a lab but then gained self - awareness. Give her unique physical features, like a distinct synth skin pattern or a special eye color. Also, think about her personality. Is she rebellious against her programming? For example, she could be a synth who refuses to follow the Institute's orders and instead helps the settlers. This creates an instant conflict and makes the character interesting.
One plot idea could be that she has to stop a villain who is trying to steal her immortality. Another is that she discovers a new threat to the world that only she, with her long - lived experience, can understand. Maybe she teams up with a group of heroes who initially don't trust her because of her immortality.
One idea could be an OC who is a brilliant scientist in the Fallout world. They could be working on a secret project to reverse the effects of radiation. Another idea is an OC who is a wandering trader, having all kinds of adventures while traveling from one settlement to another, facing raiders and mutants along the way. And a third idea could be an OC that is part of a new faction trying to bring peace and order to the wasteland.
One plot idea could be that the OC female mercenary is hired to steal a valuable artifact in the Mass Effect universe. But as she's on the mission, she discovers that the artifact has more power and significance than she thought, and she has to decide whether to complete the job or do the right thing. Another idea is that she gets caught up in a conflict between different alien races and has to choose a side.
Your OC could be a ranger who has a vendetta against a powerful orc chieftain. The orc has been raiding villages and killing innocents. The OC sets out on a mission to hunt down the orc. Along the way, they get involved in a larger conflict between the forces of good and evil. They meet other characters from the Lord of the Rings world, like Aragorn or Legolas. This plot allows for a lot of action and character development as the OC battles their personal enemy while also contributing to the greater fight against Sauron.
One plot idea could be that the fem OC discovers a hidden power within Mew that no one else has noticed. She then has to protect Mew from an evil organization that wants to use this power for their own gain. Another idea is that the fem OC and Mew form a special bond that allows them to communicate telepathically, and they use this bond to solve mysteries in the Pokemon world, like finding lost Pokemon or uncovering ancient secrets.
For an Inuyasha male OC fanfiction plot, consider this. The male OC is an artist who can paint things that come to life. He gets caught up in the chaos around the Shikon Jewel when one of his paintings accidentally becomes a powerful demon. Now he has to work with Inuyasha and the others to defeat it. Or he could be a demon slayer who has a personal vendetta against a particular type of demon that is also involved in the Shikon Jewel saga. His presence disrupts the group's dynamics at first, but they soon realize they need his skills. Another idea is that he's a messenger from another dimension who brings news of a greater threat that will affect not only the Inuyasha world but also other dimensions.
One plot idea could be that the male OC is a detective hired to investigate strange disappearances in the Black Butler world. He starts to suspect that there's a supernatural force at work and teams up with the main characters to solve the mystery. Another idea is that he's a nobleman's son who has a secret identity as a vigilante, fighting against the corrupt nobles. He might cross paths with Ciel and Sebastian when they're on a mission related to the same nobles.
One plot idea could be that the female OC is on a quest to find a hidden treasure that was once her family's. Along the way, she has to outwit other pirates who are also after the treasure. Another idea is that she is wrongly accused of a crime she didn't commit in a pirate port and has to clear her name while also dealing with the various pirates and scoundrels in the area.
A plot could involve the male OC being related to one of the scientists who worked at the lab. He comes to Hawkins to find out what really happened to his relative. Along the way, he teams up with the kids and they uncover a conspiracy that goes deeper than they thought. Or perhaps the male OC is an artist and he starts having visions of the Upside Down through his art, which leads him on a journey to figure out what they mean.